oliver



(Mode1.) 2 Sheets-Sheet 1.

H. W. OLIVER.

DIAL FOR TIME PIECES.

No. 329,849. Patented NOV. 3, 1885..

WITNESSES: INVENTOR:

PETERS. mmmogrlpher, Wuh'mginn. D4 C.

(ModeL) 2 Sheets-Sheet 2.

H. W. OLIVER.

DIAL FOR TIME PIECES,

No. 329,849. Patented Nov. 3, 1885.

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V UNITED STATES PATENT OFFICE.

HENRY W. OLIVER, OF NEW YORK, N. Y.

DIAL FOR TIM E-PIECES.

I SPECIFICATION forming part of Letters Patent No. 329,849, datedNovember 3, 1885.

Application filed February 9, 1835. Serial No. 155,317.

To all whom it may concern:

Be it known that I, HENRY W. OLIVER, of the city, county, and State ofNew York, have invented certain new and useful Improvements in Dials forTime-Pieces, of which the follow ing is a full, clear, and exactdescription.

This invention consists in a compound dial of novel construction, and incertain automatic attachments connected therewith for indicatingstandard time in clocks, watches, and other time-pieces, substantiallyas hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 represents a face view of a compound clock-dial embodying myinvention, with a central portion of the outer one of the two dials ofwhich it is composed broken away for the purpose of exhibiting certainautomatic shifting mechanism of the outer dial in position when saiddial has been shifted to exposethe hours running from 1 to 12. Fig. 2 isa like View of like parts when the outer dial has been shifted to exposethe hours running from 13 to 24. Fig. 3 is an inside or back View of ithe outer dial detached,with its attached shiftslides.

ing devices; and Fig. 4, a face View of the inner dial, showing alsocertain appliances that operate in connection with the attached shiftingdevices of the outer dial. Fig. 5 is a section on the line or x in Fig.7, showing the inner dial-plate, as seen from the rear, and certainspring-slides connected therewith, whichengage with the shifting deviceson the outer dial, also showing a cam for operating said Fig. 6 is afront View of a plate at the back of the inner dial, showing also thecam and gear for operating the spring-slides. Fig. 7 is a transversesection, on the line y 3 in Fig. 1, of the compound dial, with itsattachments and clock-frame. Fig. 8 is a section, upon a larger scale onthe line z 2111 Fig. 3, of certain of the automatic outer-dial-shiftingdevices; and Fig. 9, a section of the same on the line 10 v win Fig. 8.

(Modch) or has connected with it an outer ring or series of shields, B,arranged to project within the numerals on said main fixed dial thatrepresent the hours running from 13 to 21.

C is an outer or movable dial concentric with the main dial, and havinghour-divisions on it ranging and numbered from 1 to 12, also havingapertures Z) in it between its numerals, which apertures, whenuncovered, expose the numerals on the plain dial A, but which,when undercover of the overlapping shields B, cause the numerals on the movabledial 0 only to be exposed. These two adjustments of the movable dial 0and changed exposures of the numerals on the compound dial are clearlyshown in Figs. 1 and 2 of the drawings. The movable dial 0 is supportedupon a center pivot or by means of a sleeve, 0, so as to freely turn onthe barrel (2 of the hour-hand e.

D is the central arbor, upon which the minute-hand f is secured. Theminute or other intermediate divisions are arranged on the fixed or maindialAand the stationary shields B or outside of the same.

E is the frame of the clock-movement.

To indicate standard time by means of this compound dial, the movabledial 0 is turned or set, so as to expose the numerals on it from 1 to12, and to conceal the numerals ranging from 13 to 24 on the main orfixed dial A, the apertures b in the movable dial then being under coverof the shields B. After the time has run for the first twelve hours ofthe day, the movable dial 0 is then turned back to bring its numeralsunder cover of the overlapping shields B and to expose through itsapertures b the numerals ranging from 13 to 24 on the main or fixed dialA. This is done automatically by the working of the timepiece, andpreferably by the means substauand the back of each incline g, slightlycontracting in width toward the outer end of each incline, beyond whichthe springs h project. A cross-groove, 7a, is made in the rear side ofthis device G, immediately under the base of each incline g. This grooveis open at its one end to the slot 2', which extends below or inwardlybeyond the incline, and at its opposite end, at the foot of the incline,is also open. Furthermore, each of these grooves is fitted with aspring, Z, extending mainly throughout its length and having its freeend terminate'at or near the back of each incline 9, said spring flexingtoward and from the dial.

H H are two independent radial slides, arranged to lie in recesses m inthe back of the main or fixed dial A, or between said dial and a plate,it. These slides are pressed inward by spiral springs 0, arranged aroundthem, and are each provided with a laterally-projecting pin or stud, 8.These pins control the device G, and said springslides H H arealternately forced outward by a cam, I, on the sleeve 0, which sleevecarries a geanwheel, J ,that is connected with the clock mechanism inany suitable way, so as, with its attached cam I, only to revolve oncewhile the hour-hand barrel d makes two revolutions. Supposing thecompound dial to be set as shown in Fig. 1, exposing the first twelvehours of the day on the movable dial C shortly before the hour hand orpointer e arrives over the numeral 12 on said dial, the cam I acts uponthe one spring-slide H to move it outward, and so that the stud s onsaid slide travels outward in the one sloti over the apex of the oneincline g, the spring h adjacent to said incline being slightly pressedbackward in such action and afterwardthat is, so soon as said studspassesthe apex of the adjacent incline r recoiling and by its pressureon the one side of the stud, which then is unsupported on its oppositeside bythe straight back of the incline, causing the device G to bestarted in its rocking movement sufiicient to bring the face or slopingside of the incline under or within said studs, so that in the recoil ofthe spring 0 of said slide to fully throw or rock the device G, by thetravel of the stud inward in a straightline or course over the slopingface of the incline, said stud is prevented, on startingitsinwardmovement, from returning down the slot z from which it had passed out,and is therefore compelled to move down the face of the incline until itreaches the groove It on the same side of the axis of the dial, andpasses at its inner end onto or over the root end of the spring Z at thesame end of the device G. This moves the device G and its attached dial0 to shift it to the left, as shown in Fig. 2, exposing the numerals onthe main dial ranging from 13 to 24, and concealing under the shields Bthe numerals on the movable dial 0, ranging from 1 to 12. After theclock has run the next succeeding twelve hours, the cam I, revolvingonly once for each two revolutions of the hourhand, acts upon the otherspring-slide H to move it outward, and by its stud 8, controlled in likemanner by the adjacent spring h, and acting, as itis drawn inward, uponthe adjacent incline g, and passing into the groove k, over the spring Zpertaining to said incline, causes the device G and its attached dial 0to be moved to the right. again, as shown in Fig. 1,

causing the numerals ranging from 1 to 12 to be exposed again, and thenumerals on the main or fixed dial A to be concealed. In thisintermittent oscillating movement of the de .vice G and its attacheddial Gthat is, one

movement during each twelve hoursthe spri'ngsl are each alternately,oncein twentyfour hours, pressed inward by their travel against or back ofthe stndss till each stud in succession iscleared by itsrespectivespring Z, andis brought into position against its spring h for the cam Ito act upon its slide H to force outward said slide again for action asbefore. The object of the springs Z is that, after they havesuccessively cleared the studs 8, they will serve to lock the device Gand dial 0 in their adjusted posit-ions, and so prevent a back or recoilmovement thereof, and to hold the dcviee G in its proper position forthe stud s, first of the one slide II and then of the other, to travelin the slot t in which it moves when the slide is forced outward by thecam I, as hereinbefore described.

It should be borne in mind that the studs 8 on i v the straight slidingdevices H travel over the back and sloping sides of the inclines g torock the device G; and when either one of said studs reaches the groove7; at the base of the incline it rests on the root end of the spring Zin said groove, and when the device G is rocked in a reverse directionsaid spring is flexed inward by the passage of the spring over and backof the bearing end of the stud till the free end of the spring clearsthe stud when the spring flexes outward again and so locks the device Gand dial 0 in their adj usted positions by the free end of said springtaking its position on the side of the stud, as

shown in Fig. 9 of the drawings.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. A compound dial for timepieces for indicating standard time, composedof a main inner stationary dial having one set of numerals indicatingthe hourly divisions for one half of the day, stationary shieldsarranged to cover the intermediate spaces between said inclines g on itsopposite ends on opposite sides of the axis of the dial, spring-slides HH, arranged to independently act upon said inclines, and means,substantially as specified, for automatically and successively operatingsaid slides once in twelve hours, as and for the purposes herein setforth.

3. The shifting device G of the movable dial, having inclines you itsouter ends, and provided with springs h, arranged to project beyond saidinclines and to leave outwardlycontracting slots ibetween them and theback of the inclines, in combination with the independent springslides HH, having attached studs or projections s, for operation togetheressentially as and for the purpose herein set forth.

4. The locking-springs Z, in combination with the dial-shifting deviceG, constructed for operation substantially as described, and theindependent spring-slidesHH, constructed to engage with said shiftingdevice, substantially as and for the purposes set forth.

5. The combination, with the dial-shifting device G, of the attachedsprings h and Z, essentially as and for the purposes described.

6. A compound dial for time-pieces for indicating standard time in whichis combined a main stationary dial having overlapping shields betweenits numerals, a concentric backwardly and forwardly moving dial havingapertures between its numerals and arranged to work between the shieldsand the main dial, a shifting device, substantially as described, forintermittently oscillating the movable dial, and means, substantially asdescribed, for automatically operating the dialshifter in reversedirections each succeeding twelve hours of the day, essentially asspecified.

HENRY W. OLIVER.

WVitnesses:

A. GREGORY, C. SnDGwIoK.

